PRELIMINARY STUDIES ON THE RELEASE OF THE PREDATORY MITE PHYTOSE1ULUS MACROPIL1S (BANKS) ON STRAWBERRY PLANTS TO CONTROL TETRANYCHUS URTICAE KOCH (ACARI: TETRANYCHIDAE-PHYTOSEIIDAE). | ||
| Egyptian Journal of Agricultural Research | ||
| Article 7, Volume 78, Issue 4, December 2000, Pages 1517-1523 PDF (1.67 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.2000.399714 | ||
| Author | ||
| GAMAL A. IBRAHIM | ||
| Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt | ||
| Abstract | ||
| in a field study, the predatory mite, Phytoseiulus macropilis (Banks) was released two, four and six times at a rate of 10 individuals/ bit to control the two-spotted spider mite, Tetranychus urticae Koch in about 175 m2 of a commercial strawberry field at El-Oalyobia Governorate. The spider mite population was reduced at all numbers of predator release; the decrease had a positive relationship with number of releases. The mite reduction was slightly few after the first release but increased gradually after every predator release. It averaged 41, 48 and 35% in the first post-count, but reached 92, 95 and 97% in the last inspection in treatments that received two, four and six releases, respectively. It could be advisable to release this predator species when T.urticae population is at a low density to allow a suitable chance for the predator to play its role successfully. The associated weeds (mainly blackberry) seemed to be important as a good shelter for the predator, from which it could disperse to adjacent plants or next crop. | ||
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